Somewhere to park the bike, with shelter if possible
At least one room without a posh floor so I can walk in wearing my SPD's without feeling guilty! (within reason - protruding cleats IMHO would be pushing it a bit)
A water tap somewhere to refill water bottles.
Some nice soft drinks.
Filter coffee and tea by the mug.
A jug of water and glasses to help yourself (personally I wouldn't mind if, say, there was an air ambulance collection box next to this)
Somewhere to sit outside, away from smokers.
If you are selling food, a cyclist or walkers special (like the menu for this place http://www.manorhousetearooms.co.uk/
Brompton, Condor Heritage, creaky joints and thinning white (formerly grey) hair
""You know you're getting old when it's easier to ride a bike than to get on and off it" - quote from observant jogger !